Indoor unit of air conditioner

ABSTRACT

An indoor unit of an air conditioner includes: a bottom shell, at least two air passages (11) are provided abreast in the bottom shell (1); an air passage cover plate (2), provided on the at least two air passages (11) in a covering manner, flow guide openings (21) corresponding to the at least two air passages (11) are provided in the air passage cover plate (2) respectively; at least two centrifugal fans (3), provided in the at least two air passages (11) respectively and provided opposite to the corresponding flow guide openings (21); and an evaporator (4), provided on a side, far away from the bottom shell (1), of the air passage cover plate (2), each of the flow guide openings (21) is provided opposite to the evaporator (4).

TECHNICAL FIELD

The disclosure relates to a field of cooling equipment, and moreparticularly to an indoor unit of an air conditioner.

BACKGROUND

Most of existing split air conditioners adopt cross-flow air ductsystems. There are few wall-mounted air conditioners adoptingcentrifugal air duct systems, but most of them adopt single centrifugalfans, so there are limited air volumes, increase of cooling and heatingcapacities of the air conditioners is restricted, meanwhile, the wholeair conditioners are heavy, and have many defects, and use of users isaffected.

SUMMARY

The disclosure is intended to provide an indoor unit of an airconditioner, so as to solve the problem of restriction of a limited airvolume to cooling of the air conditioner in a conventional art.

In order to achieve the purpose, the invention provides an indoor unitof an air conditioner, which comprises: a bottom shell, at least two airpassages are provided abreast in the bottom shell; an air passage coverplate, provided on the at least two air passages in a covering manner,flow guide openings corresponding to the at least two air passages areformed in the air passage cover plate respectively; at least twocentrifugal fans, provided in the at least two air passages respectivelyand provided opposite to the corresponding flow guide openings; and anevaporator, provided on a side, far away from the bottom shell, of theair passage cover plate, each of the flow guide opening beings isprovided opposite to the evaporator.

Furthermore, each of the centrifugal fans is provided with a flow guidering, an air inlet opposite to a corresponding flow guide opening isprovided in the flow guide ring, a flange for preventing air leakage isformed along an edge of the corresponding flow guide opening, and theflange extends into the air inlet.

Furthermore, each of the centrifugal fans is provided with a flow guidering, an air inlet opposite to a corresponding flow guide opening isprovided in the flow guide ring, an annular air stopping protruding edgeprotruding towards the air passage cover plate is provided along acircumferential direction of the air inlet, and an air leakagepreventing groove matched to the air stopping protruding edge isprovided along a circumferential direction of the flow guide opening.

Furthermore, each of the centrifugal fans comprises: a flow guide ring;a blade body plate, provided at interval with the flow guide ring, a hubprotruding towards a direction of the flow guide ring and used forcovering a fan motor is provided on the blade body plate; and aplurality of fan blades, all mounted between the flow guide ring and theblade body plate, the fan blades are provided along a circumferentialdirection of the hub.

Furthermore, a vertical plate extending along side edges of the airpassages is provided on a side, facing the bottom shell, of the airpassage cover plate, and the vertical plate is overlapped with sidewallsof the air passages.

Furthermore, a support rib for supporting the evaporator is provided ona side, far away from the bottom shell, of the air passage cover plate.

Furthermore, each of the air passage is provided with two air outlets,and air outlet directions of the two air outlets are different.

Furthermore, one in the two air outlets of each of the air passages isprovided in an upper part of the indoor unit of the air conditioner, andthe other is provided in a lower part of the indoor unit of the airconditioner.

Furthermore, the indoor unit further comprises a front panel, the frontpanel is provided on a side, back on to the bottom shell, of theevaporator, and the front panel can be forwards pushed out.

Furthermore, the indoor unit further comprises a panel body providedbetween the front panel and the evaporator, and the panel body comprisesa frame and a filter net provided on the frame in a covering manner.

Furthermore, a grill is connected along an edge of the front panel, andthe grill is provided in a manner of following the front panel.

Furthermore, the evaporator comprises a first heat exchanger, and thefirst heat exchanger is provided with the flow guide openings in acovering manner; or, the evaporator comprises second heat exchangers,and each of the second heat exchangers is provided at one of thecorresponding flow guide openings respectively.

Furthermore, the indoor unit further comprises a base for bearing theevaporator, a placement groove adapted to the evaporator is provided inthe base, a bearing platform for bearing the evaporator is provided on asidewall of the placement groove, and a drain trough is provided in thebearing platform.

Furthermore, the indoor unit further includes a base for bearing theevaporator, a placement groove adapted to the evaporator is provided inthe base, a support vertical plate for supporting the evaporator isprovided in the placement groove, and the support vertical platecomprises a plurality of support plate segments provided at intervals.

Furthermore, the base is connected to the air passage cover plate, andis positioned on a side, back on to the bottom shell, of the air passagecover plate.

Furthermore, the evaporator comprises an evaporator body; and a bottomframe, provided below the evaporator body, a plurality of drain holes isprovided in the bottom frame.

Furthermore, the drain holes are divided into multiple rows of drainholes, and the drain holes in every two adjacent rows are provided in astaggered manner.

Furthermore, the at least two air passages comprise a first air passageand a second air passage adjacent to the first air passage, and anelectric box mounting part is provided between the first air passage andthe second air passage.

Furthermore, a first upper volute tongue is provided on a side, close tothe second air passage, of a first end of the first air duct, a secondupper volute tongue is provided on a side, close to the first airpassage, of a first end of the second air passage, and the first uppervolute tongue and the second upper volute tongue are provided on oneside of the electric box mounting part respectively.

Furthermore, the indoor unit further includes a first wiring passageextending from the electric box mounting part to two sides of theelectric box mounting part.

Furthermore, the first wiring passage is provided in one side, back onto the bottom shell, of the air passage cover plate.

Furthermore, the indoor unit further comprises a second wiring passage,and the second wiring passage is provided between the first air passageand the second air passage, and extends along the air passages.

Furthermore, the indoor unit further comprises a third wiring passageand a fourth wiring passage, the third wiring passage extends from thesecond wiring passage to a corresponding centrifugal fan in the firstair passage, and the fourth wiring passage extends from the secondwiring passage to a corresponding centrifugal fan in the second airpassage.

With application of the technical solution of the disclosure, the indoorunit of the air conditioner is provided with multiple air ducts, a fanis arranged in each air duct, and multiple fans are used for heatexchange between a heat exchange unit and an external environment, sothat the problem of restriction of a limited air volume to cooling ofthe air conditioner in the conventional art is solved.

BRIEF DESCRIPTION OF THE DRAWINGS

Specification drawings forming a part of the invention are adopted toprovide a further understanding to the invention, and schematicembodiments of the invention and descriptions thereof are adopted toexplain the invention and not intended to form improper limits to theinvention. In the drawings:

FIG. 1 is an exploded structure diagram of an air conditioner accordingto an embodiment of the invention;

FIG. 2 is a three-dimensional structure diagram of a bottom shell of anair conditioner according to an embodiment of the invention;

FIG. 3 is an enlarged structure diagram of a part P in FIG. 2;

FIG. 4 is a front structure diagram of a bottom shell of an airconditioner according to an embodiment of the invention;

FIG. 5 is a structure diagram of a bottom shell of an air conditionerand a motor mounted on the bottom shell according to an embodiment ofthe invention;

FIG. 6 is a structure diagram of a bottom shell of an air conditionerand centrifugal fans mounted on the bottom shell according to anembodiment of the invention;

FIG. 7 is an exploded structure diagram of FIG. 6;

FIG. 7a is a structure diagram of a centrifugal impeller of acentrifugal fan of an air conditioner according to an embodiment of theinvention;

FIG. 8 is an exploded structure diagram of a bottom shell of an airconditioner and centrifugal fans mounted on the bottom shell accordingto an embodiment of the invention;

FIG. 9 is a structure diagram of an air passage cover plate and electricbox of an air conditioner according to an embodiment of the invention;

FIG. 10 is a structure diagram of an air passage cover plate of an airconditioner according to an embodiment of the invention;

FIG. 11 is a partial enlarged structure diagram of FIG. 10;

FIG. 12 is a structure diagram of a first cover plate of an airconditioner according to an embodiment of the invention;

FIG. 13 is a structure diagram of a second cover plate of an airconditioner according to an embodiment of the invention;

FIG. 14 is a structure diagram of a bottom shell and air passage coverplate of an air conditioner according to an embodiment of the invention;

FIG. 15 is a structure diagram after a bottom shell, air passage coverplate and centrifugal fans of an air conditioner are mounted togetheraccording to an embodiment of the invention;

FIG. 16 is a sectional structure diagram of a part A-A in FIG. 15;

FIG. 17 is an enlarged structure diagram of a part M in FIG. 16;

FIG. 18 is a partial enlarged structure diagram of FIG. 16;

FIG. 19 is a structure diagram of an evaporator and base of an airconditioner according to an embodiment of the invention;

FIG. 20 is a sectional structure diagram of a part B-B in FIG. 19;

FIG. 20a is an enlarged structure diagram of a part C in FIG. 20;

FIG. 21 is an exploded structure diagram of a panel body and a frontpanel of an air conditioner according to an embodiment of the invention;

FIG. 22 is a structure diagram of a driving structure and an air inletgrill of an air conditioner according to an embodiment of the invention;

FIG. 23 is a structure diagram of an air conditioner (a front panel isnot pushed out) according to an embodiment of the invention;

FIG. 24 is a structure diagram of an air conditioner (a front panel ispushed out) according to an embodiment of the invention;

FIG. 25 is a sectional structure diagram of FIG. 24;

FIG. 26 is a three-dimensional structure diagram of an air conditioner(a front panel is pushed out) according to an embodiment of theinvention;

FIG. 27 is a flowchart of turning-on steps of an embodiment of a controlmethod for an air conditioner according to an embodiment of theinvention; and

FIG. 28 is a flowchart of turning-off steps of an embodiment of acontrol method in FIG. 27.

Wherein, the drawings include the following drawing reference signs:

1, bottom shell; 11, air passage; 11 a, first sidewall; 11 b, secondsidewall; 111, first air passage; 112, second air passage; 121, upperair outlet; 122, lower air outlet; 1211, first upper air outlet; 1212,second upper air outlet; 1221, first lower air outlet; 1222, secondlower air outlet; 13, electric box mounting part; 131, electric box;1321, second wiring passage; 1322, third wiring passage; 1323, fourthwiring passage; 133, first cover plate; 1331, first connecting part;1332, second connecting part; 134, second cover plate; 1341, thirdconnecting part; 1342, fourth connecting part; 14, motor radiation hole;151, first upper volute tongue; 152, second upper volute tongue; 153,first lower volute tongue; 154, second lower volute tongue; 16, swingmechanism; 161, first upper swing mechanism; 162, second upper swingmechanism; 163, first lower swing mechanism; 164, second lower swingmechanism; 171, upper air deflector; 173, lower air deflector; 181, airpassage bottom surface; 1821, mounting groove bottom surface; 1822,mounting groove sidewall; 2, air passage cover plate; 21, flow guideopening; 211, first flow guide opening; 212, second flow guide opening;22, first wiring channel; 221, separation plate; 2211, wiring nick; 222,avoiding nick; 23, driving box; 24, air leakage preventing groove; 25,support rid; 26, vertical plate; 3, centrifugal fan; 3 a, firstcentrifugal fan; 3 b, second centrifugal fan; 31, centrifugal impeller;311, hub; 3111, air vent; 312, air stopping protruding edge; 32, motorgland; 321, first cover body; 322, connecting flange; 323, reinforcingstructure; 33, fan motor; 313, blade body plate; 314, flow guide ring;4, evaporator; 5, base; 51, placement groove; 52, bearing platform; 53,support vertical plate; 54, water diversion pipe; 6, front panel; 61,upper air inlet; 62, lower air inlet; 63, lateral air inlet; 7, panelbody; 71, baffle plate accommodating groove; 73, air inlet grill; 74,frame; 75, filter net; 76, driving mechanism; 81, upper air inlet baffleplate; 82, lower air inlet baffle plate; 9, air outlet baffle plate; 91,upper air outlet baffle plate; 92, lower air outlet baffle plate; 93,stepper motor; 94, retaining step surface; 95, second avoiding groove;and 96, sealing gasket.

DETAILED DESCRIPTION OF THE EMBODIMENTS

It is important to note that the embodiments in the invention andcharacteristics in the embodiments may be combined without conflicts.The invention will be described below in detail with reference to thedrawings and in combination with the embodiments.

As shown in FIG. 1, FIG. 9 and FIG. 24, an air conditioner of theembodiment comprises a bottom shell 1, a centrifugal fan 3, an airpassage cover plate 2, an evaporator 4, a panel body 7, a front panel 6,an upper air inlet baffle plate 81, a lower air inlet baffle plate 82and an air outlet baffle plate 9 which are sequentially arranged. Thestructures will be introduced below one by one.

As shown in FIG. 2 to FIG. 8 and FIG. 25, the bottom shell 1 is providedwith an upper side and a lower side which are provided opposite to eachother, an air passage 11 extending from the upper side to the lower sideis provided in the bottom shell 1, the air passage 11 is provided withan upper air outlet 121 corresponding to the upper side and a lower airoutlet 122 corresponding to the lower side, an upper air deflector 171and an upper swing mechanism are provided at an upper air outlet 121,and a lower air deflector 173 and a lower swing mechanism are providedat the lower air outlet 122. The upper air outlet 121 blows air upwards,and the lower air outlet 122 blow air downwards. In such a manner, auser may regulate air to be blown through the upper air outlet 121and/or the lower air outlet 122 according to a practical requirement,and regulation amplitudes of the air outlet directions are furtherincreased, thereby improving comfort of the user. A motor radiation hole14 is provided in the bottom shell 1, and specific structures andfunctions of the motor radiation hole 14 will be described later indetail.

As shown in FIG. 9 and FIG. 10, the air passage cover plate 2 isprovided with a flow guide opening 21 communicated with a correspondingair passage 11. A specific structure and function of the air passagecover plate 2 will be described later in detail.

As shown in FIG. 1, FIG. 7, FIG. 7a and FIG. 8, the centrifugal fans 3are provided in the air passages respectively. Each of the centrifugalfans 3 comprises a fan motor 33 and a centrifugal impeller 31 driven bythe fan motor 33, and the centrifugal impeller 31 is provided with ablade body plate 313. Specific structures and positional relationshipsof the centrifugal fans 3 will be described later in detail.

As shown in FIG. 1, the evaporator 4 is provided on a side, far awayfrom the bottom shell 1, of the centrifugal fans 3. In the embodiment,the evaporator 4 covers all the flow guide openings 21. Or in otherimplementation modes, an evaporator is correspondingly provided at eachof the flow guide openings 21.

As shown in FIG. 1, FIG. 24 and FIG. 26, the front panel 6 is movablyprovided on the bottom shell 1, the front panel 6 preferably has anopening position far away from the bottom shell 1 and a closing positionclose to the bottom shell 1, and when the front panel 6 is at theopening position, an air inlet is formed between the front panel 6 andthe bottom shell 1, wherein the air inlet comprises an upper air inlet61, a lower air inlet 62 and a lateral air inlet 63 formed between theupper air inlet 61 and the lower air inlet 62. Furthermore, the upperair inlet 61 and the lower air inlet 62 are formed between the airpassage cover plate 2 and the front panel 6. Preferably, a position ofthe front panel 6 and the air passage cover plate 2 is adjustablyconnected. Since the position of the front panel 6 and the air passagecover plate 2 is adjustably connected, a distance between the frontpanel 6 and the air passage cover plate 2 is changed to regulate a sizeof the air inlet to further endow the characteristic of adjustability ofan inlet air volume within a unit time to the air conditioner and makethe air conditioner thinner. Of course, the front panel 6 is alsofixedly provided on the bottom shell 1, and the air inlet is formedbetween the front panel 6 and the bottom shell 1. The panel body 7comprises a frame and a filter net 75 provided on the frame 74 in acovering manner. The condition that impurities enter an indoor unit ofthe air conditioner to hinder normal work of the indoor unit of the airconditioner is favorably avoided, and a probability of occurrence of afailure of the indoor unit of the air conditioner is favorably reduced.

As shown in FIG. 24, the upper air inlet baffle plate 81 iscorrespondingly provided at the upper air inlet 61, and is used forcovering or opening the upper air inlet 61. The lower air inlet baffleplate 82 is correspondingly provided at the lower air inlet 62, and isused for covering or opening the lower air inlet 62. When the airconditioner is in an upward air blowing state, the upper air inletbaffle plate 81 overshadows the upper air inlet 61, and when the airconditioner is in a downward air blowing state, the lower air inletbaffle plate 82 overshadows the lower air inlet 62. With arrangement ofthe upper air inlet baffle plate 81 and the lower air inlet baffle plate82, when corresponding exhaust outlets exhaust air, the correspondingair inlet baffle plates is closed to effectively avoid the exhausted airflowing back, thereby effectively improving a heat exchange effect ofthe air conditioner, remarkably improving energy efficiency of the airconditioner and endowing the characteristics of low energy consumptionand high running performance to the air conditioner. Specific structuresand connecting relationships of the upper air inlet baffle plate 81 andthe lower air inlet baffle plate 82 will be described later in detail.

As shown in FIG. 9, FIG. 16, FIG. 18 and FIG. 25, a pivotal air outletbaffle plate 9 is correspondingly provided at each of the air outlets,and the air outlet baffle plate 9 has a first position avoiding thecorresponding air passage 11 and a second position sealing thecorresponding air outlet. The user may regulate air to be blown througha specific air outlet according to the practical requirement, and theregulation amplitude of the air outlet directions is increased, therebyimproving the comfort of the user. In the embodiment, the air outletbaffle plate comprises an upper air outlet baffle plate 91 and a lowerair outlet baffle plate 92, the upper air outlet baffle plate 91 isprovided corresponding to the upper air outlet 121, the lower air outletbaffle plate 92 is provided corresponding to the lower air outlet 122,the upper air outlet baffle plate 91 may avoid the upper air outlet 121or seal the upper air outlet 122 in a pivoting manner, and the lower airoutlet baffle plate 92 may avoid the lower air outlet 122 or seal thelower air outlet 122 in the pivoting manner. By such a structure, theupper air outlet 121 or the lower air outlet 122 is sealed according tothe requirement of the user. When the air conditioner is in the upwardair blowing state, in this state, the lower air outlet baffle plate 92pivots to the positions sealing the lower air outlet 122, the upper airoutlet baffle plate 91 is at the positions avoiding the upper airoutlets 121, and at this moment, the air conditioner blows air onlythrough the upper air outlet 121. Similarly, air may also be blown onlythrough the lower air outlet 122 or air may be blown through both theupper air outlet 121 and the lower air outlet 122. Specific structuresand connecting relationships of the air outlet baffle plates 9 will bedescribed later in detail.

The specific structures and functions of the motor radiation hole 14will be described below in detail.

As shown in FIG. 2 and FIG. 8, the motor radiation hole 14 are formed inpositions corresponding to the fan motors 33 on the bottom shell 1.Since the motor radiation hole 14 are provided in the bottom shell 1,that is, heat energy of the fan motors 33 is dissipated through themotor radiation hole 14 in the bottom shell 1 in a manner of dissipatingheat from the side of the bottom shell 1, so that dissipate heat effectsof the fan motors 33 may be ensured no matter whether the airconditioner is in a heating or cooling mode, and influence of modeswitching on radiation of the fan motors 33 is eliminated. Therefore,radiation reliability of the fan motors 33 is effectively improved,radiation stability of the fan motors 33 is ensured, and the fan motors33 are reduced in running temperature, high in working efficiency, lowin energy consumption and long in service life.

In the invention, the air passages 11 are formed in the bottom shell 1.The air conditioner further comprises a motor gland 32 for isolating ahousing of each of the fan motor 33 from the corresponding air passage11, and the motor gland 32 is provided outside the fan motor 33 in acovering manner, and is connected with the bottom shell 1. Since themotor gland 32 is provided outside the corresponding fan motor 33 in thecovering manner, that is, the fan motors 33 are isolated from the airpassage 11, so that influence of a temperature of air in the air passage11 on the fan motor 33 is eliminated. In addition, the radiationreliability of the fan motor 33 is ensured through the motor radiationhole 14 in the bottom shell 1, so that stability of running temperaturesof the fan motor 33 is ensured.

In a preferred implementation mode shown in FIG. 8, the motor gland 32comprises a first cover body 321 and a connecting flange 322, the firstcover body 321 is provided outside the housing of the fan motor 33 inthe covering manner, the connecting flange 322 is provided at an openend of the first cover body 321, and the connecting flange 322 is inface matched with the bottom shell 1. With arrangement of the firstcover bodies 321, it is ensured that the fan motors 33 may be stablymounted on the bottom shell 1, and meanwhile, the fan motors 33 areeffectively isolated from the air passage 11, so that runningreliability of the fan motors 33 is ensured. With arrangement of theconnecting flanges 322, connecting reliability of the first cover body321 and the bottom shell 1 is ensured. In addition, the connectingflange 322 is in face matched with the bottom shell 1, so that contactareas therebetween are enlarged, and local stress concentration iseffectively reduced.

Preferably, the motor gland 32 further comprises a reinforcing structure323, and the reinforcing structure 323 is provided on the first coverbody 321. The reinforcing structure 323 is provided on the first coverbody 321, so that overall structural strength of the motor gland 32 isstrengthened, and operational reliability of the motor gland 32 iseffectively improved.

As shown in FIG. 8, the reinforcing structure 323 comprises one or morereinforcing ribs, the reinforcing ribs extend to the open end of thecorresponding first cover body 321 along a center of the cover body, andthe multiple reinforcing ribs are provided at intervals. Of course, thereinforcing ribs may also be annularly provided on the first cover body321.

In a preferred implementation mode which is not shown, the airconditioner further comprises a fan motor fixing bracket, the fan motorfixing bracket is crimped outside the corresponding fan motor 33, and isconnected with the bottom shell 1, and a first ventilation structure isprovided on the fan motor fixing bracket. The motor radiation hole 14are formed in the bottom shell 1, and then heat on the corresponding fanmotor 33 may also be dissipated into an external environment through themotor radiation hole 14 even though the air in the air passage 11 mayinfluence the corresponding fan motor 33 through the first ventilationstructure, so that the radiation reliability of the fan motor anddiversity of radiation manners are ensured. Particularly in the coolingmode, cold air in the air passage 11 may cool the fan motor 33, therebyavoiding the fan motor 33 being overheated and ensuring runningstability and reliability of the fan motor 33.

Preferably, the air conditioner further comprises a second cover body,the second cover body is provided on the fan motor fixing bracket in arotating manner, and the second cover body is provided with a secondventilation structure. The second cover body has a first workingposition and a second working position. When the second cover body is atthe first working position, the first ventilation structure and thesecond ventilation structure are communicated and so that the airpassage 11 is communicated with the corresponding fan motor 33; and whenthe second cover body is at the second working position, the firstventilation structure and the second ventilation structure are providedin a staggered manner to isolate the air passage 11 from the fan motor33. With arrangement of the second cover body with the secondventilation structure, the working positions of the second cover body ischanged to implement switching of an isolated or communicated statebetween the fan motor 33 and the air passage 11, so that the radiationmanners for the fan motor 33 may be selectively controlled when the airconditioner is in different modes.

Specifically, the air conditioner has two working modes, comprising acooling mode and a heating mode. When the air conditioner is in thecooling mode, the second cover body is at the first working position;and when the air conditioner is in the heating mode, the second coverbody is at the second working position.

When the air conditioner is in the cooling mode, the cold air in the airpassage 11 may function to cool the fan motor 33 at this moment, therebyensuring that the fan motor 33 is in a normal running state in a mannerof combining radiation from the side of the bottom shell 1 and cold airradiation.

When the air conditioner is in the heating mode, hot air in the airpassage 11 may further increase temperature of the corresponding fanmotor 33 at this moment, and it is necessary to isolate the fan motor 33from the air passage 11 to avoid influence of the hot air on the fanmotor 33, thereby radiating the fan motor 33 only through the motorradiation hole 14 in the bottom shell 1 to ensure that the fan motor 33is in the normal running state.

As shown in FIG. 2 and FIG. 3, the motor radiation hole 14 is awaist-shaped hole or a round. When the motor radiation hole 14 is swaist-shaped hole, compared with round motor radiation hole 14, aforming area of the motor radiation hole 14 is effectively enlarged,thereby improving radiation effects of the motor radiation hole 14.

Of course, the motor radiation hole 14 is also formed into a polygon,ellipse, irregular geometric shape or the like.

In a preferred implementation mode shown in FIG. 2 and FIG. 3, there area plurality of motor radiation holes 14, the motor radiation holes 14are formed at intervals along a circumferential direction of thecorresponding fan motor 33, and long diameters of the waist-shaped motorradiation holes 14 are provided along a radial direction of the fanmotor 33. There are multiple motor radiation holes 14, so that radiationefficiency of the fan motor 33 is effectively improved, and theradiation reliability of the air conditioner is ensured. When the longdiameters of the waist-shaped motor radiation holes 14 are providedalong the radial direction of the fan motor 33, sufficient radiationareas is ensured, meanwhile, a radiation effect of the fan motor 33 ishigh in consistency, and the fan motor 33 is prevented from beinglocally overheated, so that the running reliability of the fan motor 33is improved.

Preferably, the air conditioner further comprises a centrifugal impeller31, a hub 311 of the centrifugal impeller 31 is sealed arc-shapedstructure, and the hub 311 of the centrifugal impeller 31 is providedoutside the fan motor 33 in the covering manner to reduce communicationareas between the air passage 11 and the fan motor 33. The hub 311 ofthe centrifugal impeller 31 is sealed arc-shaped structure, so that thecommunication areas between the air passage 11 and the fan motor 33 isreduced by own isolation function of the centrifugal impeller 31 tofurther reduce influence of the temperature of the air in the airpassage 11 on the fan motor 33 and ensure the running reliability of thefan motor 33.

Of course, in another preferred implementation mode, the air conditionerfurther comprises a centrifugal impeller 31, and a hub 311 of thecentrifugal impeller 31 is provided with an air vent 3111. The hub 311of the centrifugal impeller 31 is provided with the air vent 3111, sothat the communication area between the air passage 11 and the fan motor33 is enlarged, and when the air conditioner is in the cooling mode, thecold air in the air passage 11 may further function to cool the fanmotor 33 to improve the radiation reliability of the fan motor 33.

The specific structure and function of the air passage cover plate 2will be described below in detail.

As shown in FIG. 9, a vertical plate 26 extending along a side edge ofthe air passages 11 is provided on a side, facing the bottom shell 1, ofthe air passage cover plate 2, and the vertical plate 26 is overlappedwith sidewalls of the air passages 11. The vertical plate 26 isoverlapped with and pressed against the sidewalls of the air passage 11to prevent air leakage of the air passage 11. In the invention, asupport rib 25 for supporting the evaporator is provided on a side, faraway from the bottom shell 1, of the air passage cover plate 2. Witharrangement of the support rib 25, mounting reliability of theevaporator is ensured, and a contact area between the evaporator and theair passage cover plate 2 is enlarged to effectively avoid theevaporator swaying and vibrating and improve arrangement stability andrunning reliability of the evaporator. As shown in FIG. 14 and FIG. 16,the support rib 25 is positioned in middle of the air passage coverplate 2. Preferably, the support rib 25 is provided between the two flowguide openings 21. The evaporator is relatively heavy in mass andrelatively large in size, so that arranging the support rib 25 in middleof the air passage cover plate 2 may ensure placement reliability of theevaporator and also strengthen overall structural strength of the airpassage cover plate 2 to further improve the running reliability andstability of the air conditioner.

The specific structure and positional relationship of the centrifugalfan 3 will be described below in detail.

As shown in FIG. 4 to FIG. 7, FIG. 16 and FIG. 17, the bottom shell 1 isprovided with an air passage bottom surface 181 and a mounting groovefor mounting the centrifugal fan 3, the air duct bottom surface 181 isprovided on a circumferential outer side of the mounting groove, the fanmotor 33 is provided in the mounting groove, and the blade body plate313 is higher than or flush with the air duct bottom surface 181.

The air conditioner comprises the bottom shell 1 and the centrifugal fan3. The air passage and an air outlet matched with the centrifugal fan 3are provided on the bottom shell 1, and the centrifugal fan 3 isprovided in the air passage. The air conditioner of the embodimentadopts the centrifugal fan 3, and compared with cross-flow fan blades ofthe prior art, the centrifugal fan 3 has thinner size in a thicknessdirection of the air conditioner, so that a thickness of the airconditioner may be effectively reduced. In addition, the bottom shell 1is provided with the mounting groove for mounting the centrifugal fan 3,and formation of the mounting groove may further reduce the thickness ofthe air conditioner to make the air conditioner thinner. In theinvention, the centrifugal fan 3 is provided with the blade body plate313, the bottom shell 1 is provided with the air passage bottom surface181 provided on the circumferential outer side of the mounting groove,and the blade body plate 313 protrudes from the air passage bottomsurface 181. When the centrifugal fan 3 blow air, the air may be blownoutwards above the blade body plate 313, the air leaving the blade bodyplate 313 may reach the air passage bottom surface 181, and protrusionof the blade body plate 313 from the air passage bottom surface 181makes resistance of the blade body plate 313 to the air lower to furtherensure that the air conditioner may achieve a relatively large outletair volume. From the above, it can be seen that the air conditioner ofthe invention solves a thickness problem, also effectively ensures theoutlet air volume and provides a better user experience.

In embodiment 1, the mounting groove comprises a mounting groove bottomsurface 1821 and a mounting groove sidewall 1822, and the mountinggroove sidewall 1822 extend in a manner of gradually enlarging in adirection from the mounting groove bottom surface 1821 to the airpassage bottom surface 181. Such a structure makes air outlet resistancelower and further better ensures the outlet air volume.

As shown in FIG. 17, in embodiment 1, a generatrix of the mountinggroove sidewall 1822 form an acute included angle α with the mountinggroove bottom surface 1821. Such a structure is convenient to machine,manufacture, mount and overhaul, and meanwhile, such a structure mayensure relatively low air outlet resistance.

The acute included angle preferably ranges from 40° to 50°. As shown inFIG. 17, in the embodiment, the included angles α between the generatrixof the mounting groove sidewall 1822 and the mounting groove bottomsurface 1821 are 45°, and such an angle ensures simplicity formanufacturing and easiness for implementation, and is favorable forachieving a cushioning effect for guiding the air to flow.

As shown in FIG. 15 and FIG. 16, in embodiment 1, a diameter of themounting groove bottom surface 1821 is larger than an external diameterof the centrifugal fan 3. This ensures that the centrifugal fan 3smoothly rotate in spaces where they are.

As shown in FIG. 15, in embodiment 1, there are two air passages, thetwo air passages are formed abreast, and meanwhile, there are alsoarranged two centrifugal fans 3 corresponding to the air passagesrespectively. Arrangement of the two air passages and the correspondingcentrifugal fans 3 may ensure the outlet air volume on one hand andprevent a space occupied by the air conditioner from being excessivelyenlarged on the other hand. Of course, there may also be arranged threeor more than three air passages and centrifugal fans 3 according to arequirement.

As shown in FIG. 1 and FIG. 7, preferably, the fans are centrifugalfans. Each of the centrifugal fans comprises a flow guide ring 314; ablade body plate 313, provided at intervals with the flow guide ring314, a bump protruding towards direction of the flow guide ring 314 isprovided on the blade body plate 313 and a motor accommodating cavity isformed in the bump; and a plurality of fan blades, all mounted betweenthe flow guide ring 314 and the blade body plate 313, the fan blades areprovided along a circumferential direction of the bump.

The bump protruding towards the flow guide ring 314 is formed in amiddle of the blade body plate 313, the motor accommodating cavity ofwhich opening is positioned in a surface, back on to the flow guide ring314, of the blade body plate 313, is formed in the bump, the fan bladesare evenly provided in the circumferential direction of the bump, andthe motor is provided between the flow guide ring 314 and the blade bodyplate 313, so that a thickness of the indoor unit of the air conditioneris reduced, and the space occupied by the air conditioner is furtherreduced.

The specific structures and connecting relationships of the upper airinlet baffle plate 81 and the lower air inlet baffle plate 82 will bedescribed below in detail.

As shown in FIG. 23 to FIG. 25, specifically, the upper air inlet baffleplate 81 and the lower air inlet baffle plate 82 have the followingworking states: when the upper air outlet 121 and the lower air outlet122 both blow air, the upper air inlet baffle plate 81 and the lower airinlet baffle plate 82 cover the upper air inlet 61 and the lower airinlet 62 respectively; and/or when only the upper air outlet 121 blowair, only the upper air inlet baffle plate 81 covers the upper air inlet61; and/or when only the lower air outlet 122 blow air, only the lowerair inlet baffle plate 82 covers the lower air inlet 62.

It is important to note here that the air conditioner is also requiredto be ensured to have a sufficient inlet air volume at the same time ofpreventing the exhausted air from flowing back, otherwise the heatexchange effect and energy efficiency of the air conditioner may stillbe reduced. Therefore, in the invention, only when the upper air outlet121 and the lower air outlet 122 both blow air, the upper air inletbaffle plate 81 and lower air inlet baffle plate 82 of the airconditioner are both closed, otherwise the air inlet baffle platescorresponding to air exhausting may be selectively closed. When theupper air outlet 121 and the lower air outlet 122 are both closed, inletair is required to be ensured by virtue of the lateral air inlet 63.

The upper air inlet baffle plate 81 and the lower air inlet baffle plate82 are provided between the front panel 6 and the air passage coverplate 2 in an overturning manner. The upper air inlet baffle plate 81and the lower air inlet baffle plate 82 are provided between the frontpanel 6 and the air duct cover plate 2 in the overturning manner, sothat the working states of the upper air inlet baffle plate 81 and thelower air inlet baffle plate 82 may be controlled to meet return airprevention requirements of different air outlet modes.

As shown in FIG. 22, the air conditioner of the embodiment furthercomprises a driving mechanism 76, the front panel 6 is in drivingconnection with the driving mechanism 76, and the driving mechanism 76pushes out the front panel 6 forwards to form the air inlets. The frontpanel 6 is pushed out forwards to form the air inlets, so that air inletand outlet modes of the air conditioner are optimized. Placement partsprotruding towards a direction of the bottom shell 1 are provided on twosides of the panel body 7, and the placement parts are provided toaccommodate the driving mechanism 76. The placement parts for placingthe driving mechanism 76 are provided in form of protruding towards thebottom shell 1, so that the thickness of the indoor unit of the airconditioner is favorably reduced, and the space is fully utilized.

Preferably, a first side of the upper air inlet baffle plate 81 ispivotally connected with the front panel 6 or the air passage coverplate 2, and a second side of the upper air inlet baffle plate 81 is afree side. The upper air inlet baffle plate 81 is pivotally connectedwith the front panel 6 and/or the air passage cover plate 2, so thatmovement reliability and accommodation reliability of the upper airinlet baffle plate 81 are improved. When the upper air inlet baffleplate 81 is in a folded state of not stopping air, the upper air inletbaffle plate 81 may be closely attached to the air passage cover plate 2or the front panel 6 to avoid the upper air inlet 61, thereby ensuringair inlet reliability of the air conditioner.

Similarly, the connecting relationship between the lower air inletbaffle plate 82 and the front panel 6 and/or the air passage cover plate2 is similar to the connecting relationship between the upper air inletbaffle plate 81 and the front panel 6 and/or the air passage cover plate2, and will not be elaborated herein.

In a specific embodiment, the first side of the upper air inlet baffleplate 81 is pivotally connected with the air passage cover plate 2, anair inlet sealing structure is provided on a surface of the side, facingthe air passage cover plate 2, of the front panel 6, and the second sideof the upper air inlet baffle plate 81 is in sealing fit with the airinlet sealing structure. With arrangement of the air inlet sealingstructure in sealing fit with the second side of the upper air inletbaffle plate 81, return air prevention reliability of the upper airinlet baffle plate 81 is ensured, thereby solving the problem ofbackflow caused by air leakage. Of course, such an air inlet sealingstructure may also be provided at a position corresponding to the lowerair inlet baffle plate 82 on the front panel 6.

Preferably, the air inlet sealing structure comprises an air inletsealing protruding rib or an air inlet sealing step surface. When theair inlet sealing structure is the air inlet sealing protruding rib orthe air inlet sealing step surface and the upper air inlet baffle plate81 is overlapped with the air inlet sealing protruding rib or the airinlet sealing step surface, not only may a sealing effect be achieved,but also limiting and retaining effects on the upper air inlet baffleplate 81 may be achieved, thereby effectively avoiding excessivemovement of the upper air inlet baffle plate 81 and further improvingthe movement reliability of the upper air inlet baffle plate 81.

In another specific embodiment, the first side of the upper air inletbaffle plate 81 is pivotally connected with the front panel 6, and thesecond side of the upper air inlet baffle plate 81 is overturned towardsa side of the air duct cover plate 2. The front panel 6 belongs to amovement component, so that mounting the upper air inlet baffle plate 81on the front panel 6 may increase an overall weight and movement burdenof the front panel 6.

As shown in FIG. 21, for improving the accommodation reliability of theupper air inlet baffle plate 81, in the invention, a baffle plateaccommodating groove 71 is formed in a surface of the side, facing thefront panel 6, of the air passage cover plate 2, and the upper air inletbaffle plate 81 may be accommodated in the baffle plate accommodatinggroove 71. With formation of the baffle plate accommodating groove 71for accommodating the upper air inlet baffle plate 81 in the air passagecover plate 2, the upper air inlet 61 may be completely opened anduncovered when the upper air inlet baffle plate 81 is folded to avoidthe upper air inlet 61, thereby ensuring the inlet air volume of the airconditioner and ensuring the energy efficiency of the air conditioner.

Similarly, the baffle plate accommodating groove 71 may further be usedfor accommodating the lower air inlet baffle plate 82.

In a preferred implementation mode shown in FIG. 1 and FIG. 25, the airconditioner further comprises the bottom shell 1, the air passage coverplate 2, the panel body 7 and the front panel 6, the upper air inlet 61and the lower air inlet 62 are formed between the panel body 7 and thefront panel 6, and the upper air inlet baffle plate 81 and the lower airinlet baffle plate 82 are provided between the front panel 6 and thepanel body 7 in the overturning manner. At this moment, the panel body 7is clamped between the air passage cover plate 2 and the front panel 6,so that the air inlets should be formed between the panel body 7 and thefront panel 6 when the front panel 6 moves.

Preferably, positions of the front panel 6 and the panel body 7 areadjustably connected. The positions of the front panel 6 and the panelbody 7 are adjustably connected, so that a distance between the frontpanel and the panel body 7 may be changed to regulate the sizes of theair inlets to endow the characteristic of adjustability of the inlet airvolume within the unit time to the air conditioner and further optimizeheat exchange reliability of the air conditioner.

At this moment, the first side of the upper air inlet baffle plate 81 ispivotally connected with the front panel 6 and/or the panel body 7, andthe second side of the upper air inlet baffle plate 81 is a free side.The upper air inlet baffle plate 81 is pivotally connected with thefront panel 6 and/or the panel body 7, so that the movement reliabilityand accommodation reliability of the upper air inlet baffle plate 81 areimproved. When the upper air inlet baffle plate 81 is in the foldedstate of not stopping air, the upper air inlet baffle plate 81 isclosely attached to the panel body 7 or the front panel 6 to avoid theupper air inlet 61, thereby ensuring the air inlet reliability of theair conditioner.

Similarly, the connecting relationship between the lower air inletbaffle plate 82 and the front panel 6 and/or the panel body 7 is similarto the connecting relationship between the upper air inlet baffle plate81 and the front panel 6 and/or the panel body 7, and will not beelaborated herein.

In the preferred implementation mode, the first side of the upper airinlet baffle plate 81 is pivotally connected with the panel body 7, anair inlet sealing structure is provided on a surface of the side, facingthe panel body 7, of the front panel 6, and the second side of the upperair inlet baffle plate 81 is in sealing fit with the air inlet sealingstructure. With arrangement of the air inlet sealing structure insealing fit with the second side of the upper air inlet baffle plate 81,the return air prevention reliability of the upper air inlet baffleplate 81 is ensured, thereby solving the problem of backflow caused byair leakage. Of course, such an air inlet sealing structure is alsoprovided at the position corresponding to the lower air inlet baffleplate 82 on the front panel 6.

Similarly, the air inlet sealing structure comprises an air inletsealing protruding rib or an air inlet sealing step surface.

Or, the first side of the upper air inlet baffle plate 81 is pivotallyconnected with the front panel 6, and the second side of the upper airinlet baffle plate 81 is overturned towards a side of the panel body 7.

As shown in FIG. 24, for improving the accommodation reliability of theupper air inlet baffle plate 81, in the invention, a baffle plateaccommodating groove 71 is formed in a surface of the side, facing thefront panel 6, of the panel body 7, and the upper air inlet baffle plate81 is accommodated in the baffle plate accommodating groove 71. Withformation of the baffle plate accommodating groove 71 for accommodatingthe upper air inlet baffle plate 81 in the panel body 7, the upper airinlet 61 is completely opened and uncovered when the upper air inletbaffle plate 81 is folded to avoid the upper air inlet 61, therebyensuring the inlet air volume of the air conditioner and ensuring theenergy efficiency of the air conditioner. Similarly, the baffle plateaccommodating groove 71 further is used for accommodating the lower airinlet baffle plate 82.

The air conditioner in the invention further comprises air inlet grills73 provided corresponding to the lateral air inlet 63 and the lower airinlet 62 respectively, and the air inlet grills 73 are connected withthe driving mechanism 76 and/or the front panel 6 to synchronously movealong with the front panel 6. With arrangement of the air inlet grills73, the problem of accidental injuries caused by accidentally touchingthe air inlets by hands is effectively solved, thereby improving servicesafety of the air conditioner.

As shown in FIG. 22, the air inlet grills 73 are in a louver form. Whenthe whole air conditioner is mounted on a wall, it is impossible to seeinner structural details of the air conditioner through the air inletgrills 73 from the angle of the user, and indoor air enters the airconditioner through the air inlet grills 73 for heat exchange and airconditioning.

For improving accommodation reliability of the air inlet grills 73,grill accommodating grooves are formed in the panel body 7, and the airinlet grills 73 are accommodated in the grill accommodating groovesrespectively.

The specific structures and connecting relationships of the air outletbaffle plates 9 will be described below in detail.

As shown in FIG. 16 and FIG. 18, the air outlet baffle plate 9 is drivenby a stepper motor 93. The stepper motor 93 is a controllable motorfavorable for solving the problem of incomplete rotation.

A first sidewall 11 a of the air passage 11 is formed by the air passagecover plate 2, and a second sidewall 11 b of the air passage 11 isformed by the bottom shell 1.

Preferably, the air outlet baffle plate 9 is attached onto the firstsidewall 11 a of the air passage 11 at the first position. This isfavorable for avoiding ventilation of the air passage 11 being stopped.

Preferably, the air passage 11 is provided with the first sidewalls 11 aand second sidewalls 11 b which are provided opposite to each other, afirst end of the air outlet baffle plate 9 is pivotally connected to thefirst sidewall 11 a of the air passage 11, and a second end of the airoutlet baffle plate 9 is matched with the second sidewall 11 b of theair passage 11.

A rotating groove for providing a rotating space for the first end ofthe air outlet baffle plate 9 is formed in the first sidewall 11 a ofthe air passage 11. At the second position, the first end of the airoutlet baffle plate 9 is in sealing fit with a groove wall of therotating groove, and the second end of the air outlet baffle plate 9 ismatched with the second sidewall 11 b of the air passage 11 to seal thecorresponding air outlet.

Preferably, a first avoiding groove for accommodating the air outletbaffle plate is formed in the first sidewalls 11 a of the air passage11. At the first position, the air outlet baffle plate 9 is positionedin the first avoiding groove, and is attached to the first sidewall 11 aso as to avoid ventilation of the air outlet being stopped.

Preferably, a retaining step surface 94 is provided on the secondsidewall 11 b of the air passage 11, and the second end of the airoutlet baffle plate 9 is matched with the retaining step surface 94. Atthe second position, the second end of the air outlet baffle plate 9 ispressed against the retaining step surface 94, so that contact areas areenlarged, and the sealing effect is favorably improved.

Preferably, the retaining step surface 94 is back on to thecorresponding air outlet. The retaining step surface 94 faces a sidewhere the air is blown. When the corresponding air outlet is opened orsealed, the blown air drives the air outlet baffle plate 9 to rotatetowards the retaining step surface 94, and pressure of the blown air inthe air passage 11 promotes the second end of the air outlet baffleplate 9 to squeeze the retaining step surface 94, which is favorable forfurther improving the sealing effect.

Preferably, a second avoiding groove 95 for avoiding the second end ofthe air outlet baffle plate is formed in the second sidewall 11 b of theair passage 11, and a groove wall, back on to the air outlet, of thesecond avoiding groove 95 forms the retaining step surface 94.

The second avoiding groove 95 is an arc shape adapted to a movementtrack of the second end of the air outlet baffle plate 9, and forms theretaining step surface 94 at an endpoint of the movement track of thesecond end of the air outlet baffle plate 9.

Preferably, a sealing gasket 96 is provided between the air outletbaffle plate 9 and the retaining step surface 94. Furthermore, thesealing effect is improved, and occurrence of an air leakage phenomenonis prevented. The sealing gasket 96 is adopt an elastic material such assponge and rubber.

One of the two air outlets of the air passage 11 is formed in an upperpart of the air conditioner, and the other is formed in a lower part ofthe air conditioner. In the cooling mode, if the user dislikes the coldair to be directly blown downwards, the upward air outlet is adopted;and in the heating mode, if the user likes the hot air to be directlyblown, the downward air outlet is adopted. The user regulates the air tobe blown through the specific air outlets according to own requirement.

The air passage 11 is provided with the first sidewall 11 a and thesecond sidewall 11 b which are provided opposite to each other, and thefirst sidewall 11 a of the air passage 11 is provided with a firstinclined air guide surface close to the corresponding air outlet and/orthe second sidewall 11 b is provided with a second inclined air guidesurface close to the corresponding air outlet.

Preferably, the first sidewall 11 a is provided with the first inclinedair guide surface, and the first inclined air guide surface is inclinedtowards a direction deviated from a wall; and the second sidewall 11 bis provided with the second inclined air guide surface, and the secondinclined air guide surface is inclined in the direction deviated fromthe wall. The first sidewall and the second sidewall are arranged in amanner that air outlet directions are inclined towards the directiondeviated from the wall.

Preferably, the air conditioner comprises the two air passage 11 whichare formed abreast, which is favorable for increasing an air volumeinvolved in heat exchange and improving the heat exchange efficiency.

According to another aspect of the invention, a control method for theair outlet baffle plate of the abovementioned air conditioner isprovided, which comprises that: the air outlet baffle plate is driven bythe stepper motor 93 to rotate.

Preferably, the step that the air outlet baffle plate is driven by thestepper motor 93 to rotate comprises that: numbers of pulses output tothe stepper motor 93 is larger than calculated numbers of pulsesrequired by the stepper motor.

Rotation amount of the stepper motor is directly proportional to numbersof received pulses, and the calculated numbers of the pulses required bythe stepper motor are numbers of required pulses calculated according topreset required rotation amounts of the stepper motor 93 on the basis ofthe directly proportional relationship. However, there may usually existthe phenomenon that a practical rotation amount is mismatched with anumber of received pulses for a stepper motor. For avoiding thephenomenon of incomplete rotation of the air outlet baffle plate, thenumbers of the pulses output to the stepper motor should be larger thanthe calculated numbers of the pulses required by the stepper motor tosolve the problem.

In the embodiment, the air conditioner further comprises an air leakagepreventing structure. Structures and functions of the air leakagepreventing structures will be described below in detail.

As shown in FIG. 1 and FIG. 16, the air passage 11 is formed in thebottom shell 1, the air passage cover plate 2 is matched with the bottomshell 1, and is provided on the air passage 11 in the covering manner,and the air passage cover plate 2 is provided with a flow guide opening21 communicated with the air passage 11; the centrifugal impeller 31 isprovided in the air passage 11, and correspond to the flow guide opening21, and a fit clearance is formed between the centrifugal impeller 31and the air passage cover plate 2; and the air leakage preventingstructure is provided at the fit clearance to reduce leaking air volumesat the fit clearance.

With arrangement of the air leakage preventing structure at the fitclearance, an effective stopping effect is achieved at the fitclearance, overflow of inlet air from the fit clearance is avoided orreduced, the air inlet reliability is ensured, and it is ensured thatthere is a sufficient inlet air volume blown into the centrifugalimpeller 31, so that the energy efficiency and heat exchange effect ofthe air conditioner are improved, and moreover, vibration and noisecaused by turbulence are effectively reduced. Formation of condensationsis radically avoided, so that safety threats of the condensations toelectric components are eliminated, potential safety hazards areeliminated, and the running reliability of the air conditioner isfurther ensured.

As shown in FIG. 16, the air leakage preventing structure in theinvention further comprises an annular air stopping protruding edge 312,the air stopping protruding edge 312 is provided on the centrifugalimpeller 31, and are provided in a manner of extending towards a side ofthe air passage cover plate 2, and an internal diameter of the annularair stopping protruding edge 312 is larger than a diameters of thecorresponding flow guide opening 21. With arrangement of the airstopping protruding edge 312 extending towards the side of the airpassage cover plate 2 on the centrifugal impellers 31, the fit clearanceis partially covered, so that a width and leaking air volumes of an airleakage gap are reduced, and an effective inlet air volume and air inletreliability of the air conditioner are further improved.

In a specific implementation mode shown in FIG. 16, the air stoppingprotruding edge 312 is positioned on a peripheral edge of an inner sideof an upper surface of the flow guide ring of the centrifugal impeller31. The air stopping protruding edge 312 is provided on the peripheraledge of the inner side of the flow guide ring of the centrifugalimpeller 31, so that overflow of the air inlet is prevented at firsttime, and an air leakage preventing effect is optimized.

Of course, the air stopping protruding edge 312 is also provided at apart between an inner ring and an outer ring of the centrifugal impeller31, or is directly provided on an outer ring side of the centrifugalimpeller 31. In such a manner, although the air leakage preventingeffect may still be achieved, part of air volume may swirl in a spacebetween the air stopping protruding edge 312 and an inner ring side ofthe centrifugal impeller 31, which may easily cause turbulence andworsen the vibration and noise of the air conditioner.

Preferably, the air leakage preventing structure comprises an airleakage preventing groove 24 provided in the air passage cover plate 2,and the air stopping protruding edge 312 is embedded into the airleakage preventing groove 24, and form clearance fit with the airleakage preventing groove 24 (referring to FIG. 16). The air stoppingprotruding edge 312 is embedded into the air leakage preventing groove24, so that triple covering is formed in an air leakage direction, anair overflow path is prolonged, and tortuousness of the overflow path isincreased. Therefore, the air is unlikely to overflow from the fitclearance, and air leakage preventing reliability between thecentrifugal impeller 31 and the air passage cover plate 2 is ensured.

Furthermore, a groove wall surface of the air leakage preventing groove24 is a cambered surface. The groove wall surface of the air leakagepreventing groove 24 is a cambered surface, so that the air may flowalong the smooth and cambered air guide surface when overflowing, stressconcentration or swirling is avoided, and a vibration and noise of theair conditioner are effectively reduced.

The air leakage preventing structure in the invention comprises an airleakage preventing protruding edge, and the air leakage preventingprotruding edge is a flange provided in a manner of extending from thecorresponding flow guide opening 21 of the air passage cover plate 2 toa side of the air passage 11. The air flows from the side of the airpassage cover plate 2 to the side of the centrifugal impeller 31, sothat the air leakage preventing protruding edge may achieve an effectair guide effect to ensure that the air is smoothly poured into thecentrifugal impeller 31 under an action of the air leakage preventingprotruding edge. The air leakage preventing protruding edge is providedin the manner of extending from the air passage cover plate 2 to theside of the centrifugal impeller 31, so that the fit clearance ispartially covered, the width and leaking air volume of the air leakagegap are reduced, and the effective inlet air volume and air inletreliability of the air conditioner are further improved.

When the air leakage preventing protruding edge is embedded into aninner side of the flow guide opening 21 and further extends into theside of the centrifugal impeller 31, an opening direction of the airleakage gap is changed at this moment. Preferably, the air leakagepreventing protruding edge is provided at a peripheral edge of the flowguide opening 21, and is provided in the manner of extending towards theinner ring side of the centrifugal impeller 31 to deviate the openingdirection of the air leakage gap from an air inlet direction of the flowguide opening 21. When the opening direction of the air leakage gap isdeviated from the air inlet direction of the flow guide opening 21, atthis moment, air blown from the air inlet direction is directly blowninto the centrifugal impeller 31, and the inlet air is unlikely tochange a flowing direction to enter an opening of the air leakage gap,so that the leaking air volume between the centrifugal impeller 31 andthe air passage cover plate 2 is effectively reduced, and the energyefficiency and heat exchange effect of the air conditioner are ensured.

For further improving the air leakage preventing effect, the air leakagepreventing protruding edge is an annular, and the air leakage preventingprotruding edge is provided on an inner ring side of the air stoppingprotruding edge 312. With arrangement of both the air stoppingprotruding edge 312 and the air leakage preventing protruding edge, dualair leakage preventing protection is formed, and the leaking air volumeis further reduced. Since the air leakage preventing protruding edgealso has an air guide function, when the air leakage preventingprotruding edge contacts with the inlet air before the air stoppingprotruding edge 312, the air leakage preventing effect may be optimized,and the air passage cover plate 2 may function to cover and seal thecentrifugal impeller 31 to a certain extent.

Of course, the air stopping protruding edge 312 and the air leakagepreventing protruding edge may also be sequentially provided atintervals. However, in such an arrangement manner, the air leakagepreventing effect of the air conditioner is relatively poor.

In the invention, there are a plurality of flow guide openings 21, aplurality of air leakage preventing structures and a plurality ofcentrifugal impellers 31, and the centrifugal impellers 31, the flowguide openings 21 and the air leakage preventing structures are providedin a one-to-one corresponding manner. The air leakage preventingstructure is correspondingly provided at each of the flow guide openings21, so that overall air leakage preventing performance of the airconditioner is ensured. In a preferred implementation mode shown in FIG.10, there are two flow guide openings 21, and the air leakage preventingstructures are correspondingly provided at the two flow guide openings21 respectively.

Preferably, there are a plurality of air passages 11, the air passages11 are independently provided, and the air passages 11 and thecentrifugal impellers 31 are provided in the one-to-one correspondingmanner. The air passages 11 are independently provided, so thatturbulence during running of the multiple centrifugal impellers 31 iseffectively avoided, and air outlet reliability of the air conditioneris improved.

For further improving the energy efficiency and control diversity of theair conditioner, there are a plurality of evaporators in the invention,and the evaporators and the flow guide openings 21 are provided in theone-to-one corresponding manner. With use of the multiple evaporators,mass of each evaporator is reduced, so that convenience for mounting ofthe air conditioner is improved. When a single evaporator fails, onlythe single evaporator is required to be maintained and replaced, so thatmaintenance complexity and maintenance cost are reduced, and servicelife of the air conditioner is prolonged. In addition, a singleevaporator or part of evaporators may also be controlled to regulaterunning power of the air conditioner to meet different usingrequirements.

Preferably, the evaporator is a round and a shape of the evaporator isadapted to a shape of corresponding flow guide opening 21. The shape ofthe evaporator is provided to be adapted to the shape of thecorresponding flow guide opening 21, so that each part on the evaporatorhas the characteristic of high consistency in running performance, andheat exchange efficiency of each part of the evaporator is evenly. Inaddition, the round evaporator may also effectively improve the heatexchange efficiency, increase an energy efficiency level of the airconditioner and reduce power consumption, and may further savematerials, reduce cost wastes and reduce the occupied space.

It is important to note that, for ensuring uniformity of a coolant flowrate, in-tube pressure drop and temperature distribution of each part inthe evaporator, a tube diameter and a segment pitch are required to bedesigned by combining coolant flow rates of different flow paths, thein-tube pressure drops and an air velocity distribution of a surface ofthe evaporator. By adopting combined design of different tube diametersand different segment pitches, high-efficiency heat exchange isimplemented. In addition, for facilitating machining and manufacturing,U tubes of the evaporator are on the same side, and procedures ofwelding and the like are performed on a pipeline on the other side.

In the embodiment, the air passage 11 comprises a first air passage 111and second air passage 112 extending from an upper side to a lower side.A dual-air-passage arrangement form with the first air passage 111 andthe second air passage 112 and a function will be introduced below indetail.

As shown in FIG. 4 and FIG. 24, the first air passage 111 and the secondair passage 112 are symmetrically provided, wherein the first airpassage 111 is provided with a first upper air outlet 1211 correspondingto the upper side and a first lower air outlet 1221 corresponding to thelower side, and the second air passage 112 is provided with a secondupper air outlet 1212 corresponding to the upper side and a second lowerair outlet 1222 corresponding to the lower side, wherein the first upperair outlet 1211 and the second upper air outlet 1212 form the upper airoutlet 121, and the first lower air outlet 1221 and the second lower airoutlet 1222 form the lower air outlet 122.

As shown in FIG. 4, a first upper volute tongue 151 is provided at thefirst upper air outlet 1211, a first lower volute tongue 153 is providedat the first lower air outlet 1221, a second upper volute tongue 152 isprovided at the second upper air outlet 1212, and a second lower volutetongue 154 is provided at the second lower air outlet 1222.Specifically, the first lower volute tongue 153 and the second lowervolute tongue 154 protrude towards directions of getting close to eachother respectively, and the first upper volute tongue 151 and the secondupper volute tongue 152 protrude towards directions of getting deviatedfrom each other respectively. The air conditioner of the embodimentfurther comprises a first centrifugal fan 3 a and a second centrifugalfan 3 b, wherein the first centrifugal fan 3 a is provided in the firstair passage 111, and the second centrifugal fan 3 b is provided in thesecond air passage 112.

In the invention, the first lower volute tongue 153 and the second lowervolute tongue 154 protrude towards the directions of getting close toeach other respectively, and the first upper volute tongue 151 and thesecond upper volute tongue 152 protrude towards the directions ofgetting deviated. The arrangement directions of the first lower volutetongue 153 and the second lower volute tongue 154 determine convergenceof an air outlet direction of the first air passage 111 at the firstlower air outlet 1221 and an air outlet direction of the second airpassage 112 at the second lower air outlet 1222. In such a manner, whenthe air conditioner is in the heating state, hot air flows out of thefirst lower air outlet 1221 and the second lower air outlet 1222 of theair conditioner, and the hot air flowing from the first air passage 111is converged with the hot air flowing from the second air passage 112 tofurther improve a heating effect and improve heating performance of theair conditioner. In addition, the hot air is relatively low in density,the hot air slowly rises after being blown from the first lower airoutlet 1221 and the second lower air outlet 1222 of the air conditioner,thereby forming indoor overall thermal cycles and achieving hightemperature comfort. Therefore, the technical solution of the embodimentmay solve the problem of low heating speed of the air conditioner in theprior art.

In addition, during cooling of the air conditioner, cold air is blownfrom the first upper air outlet 1211 and the second upper air outlet1212. Blowing the cold air upwards may avoid direct blowing to a humanbody. Moreover, a gas at a low temperature is high in density, so thatthe cold air may gradually lower to increase a cooling speed. Therefore,the air conditioner of the embodiment has the characteristics of goodcooling effect and high comfort for the human body.

The air conditioner of the embodiment is provided with four air outlets,i.e. the first upper air outlet 1211, the first lower air outlet 1221,the second upper air outlet 1212 and the second lower air outlet 1222.As a preferred implementation mode, an air outlet baffle plate isprovided at each air outlet. Therefore, air blowing of the air outletsis controlled according to the requirement of the user. Specifically,during cooling or heating, the four air outlets is opened at the sametime to achieve a maximum outlet air volume. Of course, in considerationof comfort, the first upper air outlet 1211 and the second upper airoutlet 1212 are sealed by virtue of the air outlet baffle plates duringheating to blow the hot air only from the first lower air outlet 1221and the second lower air outlet 1222, and the first lower air outlet1221 and the second lower air outlet 1222 are sealed by virtue of theair outlet baffle plates during cooling to blow the hot air only fromthe first upper air outlet 1211 and the second upper air outlet 1212.

As shown in FIG. 4, in the technical solution of the embodiment, thefirst upper volute tongue 151 and the second upper volute tongue 152 areprovided on inner walls respectively, which are close to each other, onthe first upper air outlet 1211 and the second upper air outlet 1212,and the first lower volute tongue 153 and the second lower volute tongue154 are respectively provided on inner walls, which are far away fromeach other, on the first lower air outlet 1221 and the second lower airoutlet 1222. Meanwhile, a distance between the first upper volute tongue151 and the second upper volute tongue 152 is smaller than a distancebetween the first lower volute tongue 153 and the second lower volutetongue 154. Such a structure makes sizes of the first upper air outlet1211, the second upper air outlet 1212, the first lower air outlet 1221and the second lower air outlet 1222 relatively larger, and may furthereffectively ensure the outlet air volume.

As shown in FIG. 6, in the technical solution of the embodiment,rotating directions of blades of the first centrifugal fan 3 a areopposite to rotating directions of blades of the second centrifugal fan3 b. Specifically, when the first centrifugal fan 3 a and secondcentrifugal fan 3 b of the air conditioner work, the first centrifugalfan 3 a and the second centrifugal fan 3 b may drive airflows andgenerate certain impact forces on the air conditioner respectively.Since the rotating directions of the blades of the first centrifugal fan3 a are opposite to the rotating directions of the blades of the secondcentrifugal fan 3 b, the first centrifugal fan 3 a may make the impactforce, generated when the first centrifugal fan 3 a works, on the airconditioner and the second centrifugal fan 3 b may make the impactforce, generated when the second centrifugal fan 3 b works, on the airconditioner opposite. Therefore, the air conditioner is evenly in stressand stable in running, and meanwhile, the noise may be effectivelyreduced.

Preferably, when the air conditioner works, a rotating direction of thefirst centrifugal fan 3 a and a rotating direction of the secondcentrifugal fan 3 b are opposite, so that the impact forces, generatedby the first centrifugal fan 3 a and the second centrifugal fan 3 b, onthe air conditioner are further counteracted.

As shown in FIG. 7, in the technical solution of the embodiment, the airconditioner further comprises a first upper swing mechanism 161 and asecond upper swing mechanism 162, and the first upper swing mechanism161 and the second upper swing mechanism 162 form an upper swingmechanism, wherein the first upper swing mechanism 161 is provided atthe first upper air outlet 1211, and the second upper swing mechanism162 is provided at the second upper air outlet 1212. The first upperswing mechanism 161 and the second upper swing mechanism 162 are usedfor changing the air outlet directions, so that the air outletdirections of the first upper air outlet 1211 and the second upper airoutlet 1212 are more flexible.

Specifically, directions of the first upper swing mechanism 161 and thesecond upper swing mechanism 162 are controlled to selectively endow thefollowing working states to the first upper swing mechanism 161 and thesecond upper swing mechanism 162:

the first upper swing mechanism 161 and the second upper swing mechanism162 guide towards the same side;

the first upper swing mechanism 161 and the second upper swing mechanism162 convergently guide towards inner sides; and

the first upper swing mechanism 161 and the second upper swing mechanism162 diffusely guide towards outer sides.

When the air conditioner works, any one of the abovementioned workingstates may be selected. Therefore, the air outlet directions are moreflexible, and temperature regulation requirements of differentenvironments are met.

Preferably, the first upper swing mechanism 161 and the second upperswing mechanism 162 are controlled respectively, so that it is easier toimplement the three working states.

As shown in FIG. 7, in the technical solution of the embodiment, the airconditioner further comprises a first lower swing mechanism 163 and asecond lower swing mechanism 164, and the first lower swing mechanism163 and the second lower swing mechanism 164 form a lower swingmechanism, wherein the first lower swing mechanism 163 is provided atthe first lower air outlet 1221, and the second lower swing mechanism164 is provided at the second lower air outlet 1222. The first lowerswing mechanism 163 and the second lower swing mechanism 164 are usedfor changing air outlet directions, so that the air outlet directions ofthe first lower air outlet 1221 and the second lower air outlet 1222 aremore flexible.

Specifically, directions of the first lower swing mechanism 163 and thesecond lower swing mechanism 164 are controlled to selectively endow thefollowing working states to the first lower swing mechanism 163 and thesecond lower swing mechanism 164:

the first lower swing mechanism 163 and the second lower swing mechanism164 guide towards the same side;

the first lower swing mechanism 163 and the second lower swing mechanism164 convergently guide towards inner sides; and

the first lower swing mechanism 163 and the second lower swing mechanism164 diffusely guide towards outer sides.

When the air conditioner works, any one of the abovementioned workingstates may be selected. Therefore, the air outlet directions are moreflexible, and temperature regulation requirements of differentenvironments are met.

Preferably, the first lower swing mechanism 163 and the second lowerswing mechanism 164 are controlled respectively, so that it is easier toimplement the three working states.

In the embodiment, the air conditioner further comprises an electric boxmounting part 13, and a specific structure and connecting relationshipof the electric box mounting part 13 will be introduced below in detail.The electric box mounting part 13 is provided between the first uppervolute tongue 151 and the second upper volute tongue 152. An electricbox 131 mounted with a circuit board is provided in the electric boxmounting part 13, and motor wires of the first centrifugal fan 3 a andthe second centrifugal fan 3 b are connected with the circuit board,thereby supplying power to motors of the first centrifugal fan 3 a andthe second centrifugal fan 3 b. Wiring is simple and high inreliability. In addition, in the invention, the electric box mountingpart 13 is provided in a cavity formed between the first upper volutetongue 151 and the second upper volute tongue 152, and a service spaceof the bottom shell 1 is effectively utilized, so that an internalstructure of the air conditioner is more compact, and the airconditioner is thinner.

It is important to note that, in the embodiment, an electric componentprovided in the electric box 131 is a circuit board, and in otherimplementation modes not shown in the drawings, other electriccomponents capable of supplying power to the motors of the centrifugalfans may also be provided in the electric box 131 according to aspecific requirement.

As shown in FIG. 5 and FIG. 10, in the air conditioner of theembodiment, the air conditioner further comprises the air passage coverplate 2 connected with the bottom shell 1, the first centrifugal fan 3 aand the second centrifugal fan 3 b are provided between the bottom shell1 and the air passage cover plate 2, and the air passage cover plate 2is provided with a first flow guide opening 211 corresponding to thefirst centrifugal fan 3 a and a second flow guide opening 212corresponding to the second centrifugal fan 3 b. The first flow guideopening 211 and second flow guide opening 212 in the air passage coverplate 2 may function to guide airflows passing through the firstcentrifugal fan 3 a and passing through the second centrifugal fan 3 brespectively. In addition, the air passage cover plate 2 separates thebottom shell 1 from the other parts (the evaporator in the embodiment)of the air conditioner, so that mounting stability of the firstcentrifugal fan 3 a and the second centrifugal fan 3 b is enhanced.

As shown in FIG. 1, FIG. 5 and FIG. 10, in the air conditioner of theembodiment, a first wiring passage 22 is provided in the air passagecover plate 2, the first wiring passage 22 is provided in a side, faraway from the bottom shell 1, of the air passage cover plate 2, and thefirst wiring passage 22 is communicated with an inner cavity of theelectric box mounting part 13. In the embodiment, a driving box 23 isprovided on a right side edge of the air passage cover plate 2, and anelectric component such as a driving power supply is provided in thedriving box 23. An electric wire extending from the driving power supplymay extends into the inner cavity of the electric box mounting part 13through the first wiring passage 22, and is connected and conducted withthe circuit board in the electric box 131, thereby supplying the powerto the circuit board and further driving the first centrifugal fan 3 aand the second centrifugal fan 3 b to work. In addition, the firstwiring passage 22 may make a line arrangement more regular, therebyeffectively preventing interference between the electric wire and theother parts and ensuring electric safety. It is important to note thatthe driving box 23 is provided, not limited to, on the right side edgeof the air passage cover plate 2. In the other implementation modeswhich are not shown in the drawings, the driving box 23 may also beprovided at another position of the air passage cover plate 2, and forexample, is provided on a left side edge of the air passage cover plate2. Under such a condition, the first wiring passage 22 may also becorrespondingly formed in a left side of the air passage cover plate 2.

As shown in FIG. 10 and FIG. 11, in the air conditioner of theembodiment, the first wiring passage 22 is a first wiring trough. Thefirst wiring trough is simple in structure and easy to machine andmanufacture. Of course, the first wiring passage 22 is not limited tothe wiring trough, and in the other implementation modes not shown inthe drawings, may also be another wiring structure, and for example, maybe a wiring hole.

As shown in FIG. 10 and FIG. 11, in the air conditioner of theembodiment, the first wiring trough comprises a high-voltage electricwire slot and a low-voltage electric wire slot, and a separation plate221 for separation is provided between the high-voltage electric wireslot and the low-voltage electric wire slot. Such a structure mayseparate a high-voltage electric wire from a low-voltage electric wireand prevent electromagnetic interference between the high-voltageelectric wire and the low-voltage electric wire.

As shown in FIG. 10 and FIG. 11, in the air conditioner of theembodiment, a wiring nick 2211 is provided in the separation plate 221.Such a structure makes it more convenient to arrange the electric wires,and is favorable for improving wiring efficiency.

It is important to note that, in the embodiment, the first wiring troughis a split structure detachably provided on the air passage cover plate2, and wiring troughs with different lengths or different shapestructures may be selected according to specific wiring requirements. Ofcourse, the first wiring trough is not limited to the split structure,and in the other implementation modes not shown in the drawings, thefirst wiring trough and the air passage cover plate 2 may also bearranged to be one whole structure.

As shown in FIG. 10, in the air conditioner of the embodiment, anavoiding nick 222 is formed in a position, corresponding to the electricbox mounting part 13, on the air passage cover plate 2. Such a structuremay prevent interference between the air passage cover plate 2 and thebottom shell 1 during mounting.

As shown in FIG. 4 and FIG. 5, in the air conditioner of the embodiment,an air passage wall positioned between the first centrifugal fan 3 a andthe second centrifugal fan 3 b is provided on the bottom shell 1, asecond wiring passage 1321 is formed in the air passage wall, a thirdwiring passage 1322 is correspondingly formed in the bottom shell 1between the air passage wall and the first centrifugal fan 3 a, a fourthwiring passage 1323 is correspondingly formed in the bottom shell 1between the air passage wall and the second centrifugal fan 3 b, and thesecond wiring passage 1321 is communicated with the third wiring passage1322 and the fourth wiring passage 1323 respectively, wherein the secondwiring passage 1321 is communicated with the inner cavity of theelectric box mounting part 13.

When the air conditioner is assembled, the motor wire of the firstcentrifugal fan 3 a extends to the inner cavity of the electric boxmounting part 13 through the third wiring passage 1322 and the secondwiring passage 1321, and is connected and conducted with the circuitboard in the electric box 131, thereby supplying power to the motor ofthe first centrifugal fan 3 a and driving the first centrifugal fan 3 ato rotate. Similarly, the motor wire of the second centrifugal fan 3 bextends to the inner cavity of the electric box mounting part 13 throughthe fourth wiring passage 1323 and the second wiring passage 1321, andis connected and conducted with the circuit board in the electric box131, thereby supplying power to the motor of the second centrifugal fan3 b and driving the second centrifugal fan 3 b to rotate. In addition,the wiring passages may make the line arrangement more irregular,thereby effectively preventing interference between the motor wires andthe other parts and ensuring the electric safety.

As shown in FIG. 4 and FIG. 5, in the air conditioner of the embodiment,the second wiring passage 1321 is a second wiring trough, the thirdwiring passage 1322 is a third wiring trough, and the fourth wiringpassage 1323 is a fourth wiring trough. The second wiring trough, thethird wiring trough and the fourth wiring trough are simple in structureand easy to machine and manufacture. Of course, the second wiringpassage 1321, the third wiring passage 1322 and the fourth wiringpassage 1323 are not limited to the wiring troughs, and in the otherimplementation modes not shown in the drawings, may also be other wiringstructures, and for example, may be arranged to be wiring holes.

As shown in FIG. 5, in the air conditioner of the embodiment, a firstcover plate 133 is provided on the third wiring trough, and a secondcover plate 134 is provided on the fourth wiring trough. Such astructure may prevent the motor wires in the third wiring trough and thefourth wiring trough from being exposed, prevent wire bodies from beingscratched when the fan blades of the centrifugal fans rotate and preventthe motor wires from being damaged. In addition, integrity of the airpassage may also be ensured, and abnormal noises of the air passage areavoided.

As shown in FIG. 5, FIG. 12 and FIG. 13, in the air conditioner of theembodiment, a first connecting part 1331 is provided at a first end ofthe first cover plate 133, a second connecting part 1332 is provided ata second end of the first cover plate 133, a third connecting part 1341is provided at a first end of the second cover plate 134, and a fourthconnecting part 1342 is provided at a second end of the second coverplate 134. A first electric wire accommodating groove is provided in oneside, facing the bottom shell 1, of the first cover plate 133, and asecond electric wire accommodating groove is provided in one side,facing the bottom shell 1, of the second cover plate 134.

In the embodiment, positioning columns and studs are provided at theends, close to the second wiring trough, of both the third wiring troughand the fourth wiring trough, and slots are provided in the ends, faraway from the second wiring trough, of both the third wiring trough andthe fourth wiring trough. Screw holes are provided in both the firstconnecting part 1331 and the third connecting part 1341 respectively,the first connecting part 1331 is matched with the positioning columnand stud on the third wiring trough, and the third connecting part 1341is matched with the positioning column and stud on the fourth wiringtrough. Both the second connecting part 1332 and the fourth connectingpart 1342 are male tabs, the second connecting part 1332 is matched withthe slot in the third wiring trough, and the fourth connecting part 1342is matched with the slot in the fourth wiring trough. Such a structuremakes it convenient to assemble and disassemble the first cover plate133, the second cover plate 134 and the bottom shell 1. Of course,structures of the first cover plate 133 and the second cover plate 134are not limited, and in the other implementation modes which are notshown in the drawings, the first cover plate 133 and the second coverplate 134 may also be other structures capable of realizing a fixingfunction.

In the embodiment, the air duct cover plate 2 is provided on the two airpassages 11 in the covering manner, specifically the first air passage111 and the second air passage 112. The two flow guide openings 21 areprovided in the air passage cover plate 2, and the two flow guideopenings 21 comprises the first flow guide opening 211 corresponding tothe first air passage 111 and the second flow guide opening 212corresponding to the second air passage 112. The first centrifugal fan 3a is provided in the first air passage 111, and is provided opposite tothe first flow guide opening 211, and the second centrifugal fan 3 b isprovided d in the second air passage 112, and is provided opposite tothe second flow guide opening 212. The evaporator 4 is provided on oneside, far away from the bottom shell 1, of the air passage cover plate2, and each flow guide opening 21 is formed opposite to the evaporator4. In the embodiment, the indoor unit of the air conditioner is providedwith a plurality of air passages 11, one centrifugal fan 3 is providedin each air passage 11, and the centrifugal fans 3 are used for heatexchange between the evaporator 4 and the external environment, so thatthe problem of restriction of a limited air volume to cooling of the airconditioner in the conventional art is solved.

Preferably, the evaporator 4 is superposed with the air passage coverplate 2, and is positioned on one side, back on to the bottom shell 1,of the air passage cover plate 2. The air passages 11 are formed betweenthe air duct cover plate 2 and the bottom shell 1, and extend along theair passage cover plate 2, and the flow guide openings 21 are formed inthe air duct cover plate 2, and face the evaporator 4. Such a superposedstructure is favorable for reducing the thickness of the indoor unit ofthe air conditioner and reducing the space occupied by the indoor unitof the air conditioner.

As shown in FIG. 19, FIG. 20 and FIG. 20a , the air conditioner of theembodiment further comprises a base 5 for bearing the evaporator 4, aplacement groove 51 adapted to the evaporator 4 is provided in the base5, a bearing platform 52 for the evaporator 4 is provided on a sidewallof the placement groove 51, and a drain trough is provided in thebearing platform 52. A support vertical plate 53 for supporting a heatexchange unit is provided in the placement groove 51, and the supportvertical plate 53 comprises a plurality of support plate segmentsprovided at intervals. A space between every two adjacent support platesegments is used for condensed water to flow to avoid an excessivelyhigh water level of local condensed water.

As shown in FIG. 19 and FIG. 20, a drain opening is provided in theplacement groove 51, and a water diversion pipe 54 for guiding thecondensed water out of the indoor unit of the air conditioner isconnected with the drain opening. The bearing platform 52 is providedwith a plurality of drain troughs for causing the condensed water tosmoothly flow to a bottom of the placement groove for unified guide outof the indoor unit of the air conditioner along the evaporator 4. Thebase 5 is connected with the air passage cover plate 2, and ispositioned on one side, back on to the bottom shell 1, of the airpassage cover plate 2. The base 5 and the air passage cover plate 2 maybe formed integrally and form a whole structure, and may also be split.The evaporator 4 comprises an evaporator body and a bottom frame. Thebottom frame is provided below the evaporator body, and a plurality ofdrain holes are provided in the bottom frame. The condensed waterproduced on the evaporator body flows into the placement groove of thebase 5 provided below the evaporator body through the drain holes, andthen is guided out of the indoor unit of the air conditioner through thewater diversion pipe 54. Preferably, the drain holes are divided intomultiple rows of drain holes, and the drain holes in every two adjacentrows are provided in the staggered manner. Distances between the drainholes in every two adjacent rows in drain directions of the drain holesare shortened, and smooth drain of the condensed water is facilitated.

The air conditioner of the embodiment further comprises a displayconnected with the electric box, and the display is used for displayingparameters such as a working state of the indoor unit of the airconditioner and the indoor temperature.

The invention further provides a control method for an air conditioner,which is used for controlling the abovementioned air conditioner. Asshown in FIG. 27, the control method according to the embodimentcomprises a turning-on step and a turning-off step, wherein theturning-on step comprises the following steps.

In Step S10, a front panel 6 is pushed out towards a direction far awayfrom a bottom shell 1 to move the front panel 6 from a closing positionto an opening position.

In Step S30, an upper air deflector 171 and/or a lower air deflector 173are opened.

In Step S40, a centrifugal fan 3 is caused to rotate.

In Step S60, an upper swing mechanism and/or a lower swing mechanismare/is caused to drive the centrifugal fan 3.

In the embodiment, Step S10, Step S30, Step S40 and Step S60 aresequentially executed. Of course, those skilled in the art should knowthat, as an optional implementation mode, Step S30 and Step S40 may beexecuted synchronously.

As shown in FIG. 27, in the embodiment, the following step is furthercomprised between Step S10 and Step S30.

In Step S20, an upper air inlet baffle plate 81 is caused to pivot toseal an upper air inlet 61 and/or a lower air inlet baffle plate 82 iscaused to pivot to cover a lower air inlet 62 according to air outletstates of an upper air outlet 121 and a lower air outlet 122.

Of course, those skilled in the art should know that, as an optionalimplementation mode, Step S20 may also be executed between Step S40 andStep S60.

As shown in FIG. 27, in the embodiment, the following step is furthercomprised between Step S40 and Step S60.

In Step S50, an upper air outlet baffle plate 91 is caused to pivot toseal the upper air outlet 121 or a lower air outlet baffle plate 92 iscaused to pivot to seal the lower air outlet 122 according to the airoutlet states of the upper air outlet and the lower air outlet.

It is important to note that Step S20 is required to be executed beforeStep S50 when Step S20 is executed between Step S40 and Step S60.

With application of the control method of the embodiment, the frontpanel 6 is caused to move at first, so that other movement parts may beeffectively avoided, and a minimum thickness of the air conditioner maybe ensured. In addition, the upper air deflector 171 and/or the lowerair deflector 173 are/is caused to move before the upper swing mechanismand/or the lower swing mechanism, so that interference between movementmechanisms may also be prevented, and decrease of an overall size of theair conditioner is facilitated.

As shown in FIG. 28, in the embodiment, the turning-off step comprisesthe following steps.

Step S100, the centrifugal fan 3 is stopped to rotate.

Step S300, the upper swing mechanism and/or the lower swing mechanismare/is stopped to move.

Step S500, the upper air deflector 171 and/or the lower air deflector173 are/is closed.

Step S600, the front panel 6 is inwards retracted towards a directionfacing the bottom shell 1 to move the front panel 6 to from the openingposition to the closing position.

As shown in FIG. 28, in the embodiment, the following step is furthercomprised between Step S300 and Step S500.

Step S400, the upper air inlet baffle plate 81 is caused to pivot to aposition avoiding the upper air inlet 61, and/or the lower air inletbaffle plate 82 is caused to pivot to a position avoiding the lower airinlet 62.

As shown in FIG. 28, in the embodiment, the following step is furthercomprised between Step S100 and Step S300.

Step S200, the upper air outlet baffle plate 91 is caused to pivot to aposition avoiding the upper air inlet 61, and/or the lower air outletbaffle plate 92 is caused to pivot to a position avoiding the lower airinlet 62.

With application of the control method of the embodiment, the upperswing mechanism and/or the lower swing mechanism are stopped to movebefore the upper air deflectors 171 and/or the lower air deflectors 173are stopped to move, and the front panel 6 is finally retracted.Therefore, interference between the movement mechanisms may be avoided.

Of course, those skilled in the art should know that, as an optionalimplementation mode, Step S200, Step S300, Step S400 and Step S500 maybe executed synchronously. Or, only Step S200 and Step S300 are executedsynchronously. Of course, for avoiding interference, the size of the airconditioner in the abovementioned two implementation modes may beslightly larger.

The above is only the preferred embodiment of the invention and notintended to limit the invention. For those skilled in the art, theinvention may have various modifications and variations. Anymodifications, equivalent replacements, improvements and the like madewithin the spirit and principle of the invention shall fall within thescope of protection of the invention.

What is claimed is:
 1. An indoor unit of an air conditioner, comprising:a bottom shell, at least two air passages are provided abreast in thebottom shell; an air passage cover plate, provided on the at least twoair passages in a covering manner, flow guide openings corresponding tothe at least two air passages respectively are formed in the air passagecover plate; at least two centrifugal fans, provided in the at least twoair passages respectively and provided opposite to the correspondingflow guide openings; and an evaporator, provided on a side, far awayfrom the bottom shell, of the air passage cover plate, each of the flowguide openings is provided opposite to the evaporator; wherein theindoor unit of an air conditioner further comprising a base for bearingthe evaporator, wherein a placement groove adapted to the evaporator isprovided in the base; a bearing platform for bearing the evaporator isprovided on a sidewall of the placement groove, and a drain trough isprovided in the bearing platform; or, a support vertical plate forsupporting the evaporator is provided in the placement groove, and thesupport vertical plate comprises a plurality of support plate segmentsprovided at intervals.
 2. The indoor unit of the air conditioner asclaimed in claim 1, wherein the base is connected to the air passagecover plate, and is positioned on a side, back on to the bottom shell,of the air passage cover plate.
 3. The indoor unit of the airconditioner as claimed in claim 1, wherein the evaporator comprises: anevaporator body; and a bottom frame, provided below the evaporator body,a plurality of drain holes is provided in the bottom frame.
 4. Theindoor unit of the air conditioner as claimed in claim 3, wherein thedrain holes are divided into multiple rows of drain holes, and the drainholes in every two adjacent rows are provided in a staggered manner. 5.The indoor unit of the air conditioner as claimed in claim 1, whereinthe at least two air passages comprise a first air passage and a secondair passage adjacent to the first air passage, and an electric boxmounting part is provided between the first air passage and the secondair passage.
 6. The indoor unit of the air conditioner as claimed inclaim 5, wherein a first upper volute tongue is provided on a side,close to the second air passage, of a first end of the first air duct, asecond upper volute tongue is provided on a side, close to the first airpassage, of a first end of the second air passage, and the first uppervolute tongue and the second upper volute tongue are provided on oneside of the electric box mounting part respectively.
 7. The indoor unitof the air conditioner as claimed in claim 5, further comprising a firstwiring passage extending from the electric box mounting part to twosides of the electric box mounting part.
 8. The indoor unit of the airconditioner as claimed in claim 7, wherein the first wiring passage isprovided in one side, back on to the bottom shell, of the air passagecover plate.
 9. The indoor unit of the air conditioner as claimed inclaim 5, further comprising a second wiring passage, wherein the secondwiring passage is provided between the first air passage and the secondair passage, and extends along the air passages.
 10. The indoor unit ofthe air conditioner as claimed in claim 9, further comprising a thirdwiring passage and a fourth wiring passage, wherein the third wiringpassage extends from the second wiring passage to a correspondingcentrifugal fan in the first air passage, and the fourth wiring passageextends from the second wiring passage to a corresponding centrifugalfan in the second air passage.
 11. An indoor unit of an air conditioner,comprising: a bottom shell, at least two air passages are providedabreast in the bottom shell; an air passage cover plate, provided on theat least two air passages in a covering manner, flow guide openingscorresponding to the at least two air passages respectively are formedin the air passage cover plate; at least two centrifugal fans, providedin the at least two air passages respectively and provided opposite tothe corresponding flow guide openings; and an evaporator, provided on aside, far away from the bottom shell, of the air passage cover plate,each of the flow guide openings is provided opposite to the evaporator;wherein the at least two air passages comprise a first air passage and asecond air passage adjacent to the first air passage, and an electricbox mounting part is provided between the first air passage and thesecond air passage.
 12. The indoor unit of the air conditioner asclaimed in claim 11, wherein a first upper volute tongue is provided ona side, close to the second air passage, of a first end of the first airduct, a second upper volute tongue is provided on a side, close to thefirst air passage, of a first end of the second air passage, and thefirst upper volute tongue and the second upper volute tongue areprovided on one side of the electric box mounting part respectively. 13.The indoor unit of the air conditioner as claimed in claim 11, furthercomprising a first wiring passage extending from the electric boxmounting part to two sides of the electric box mounting part.
 14. Theindoor unit of the air conditioner as claimed in claim 13, wherein thefirst wiring passage is provided in one side, back on to the bottomshell, of the air passage cover plate.
 15. The indoor unit of the airconditioner as claimed in claim 11, further comprising a second wiringpassage, wherein the second wiring passage is provided between the firstair passage and the second air passage, and extends along the airpassages.
 16. The indoor unit of the air conditioner as claimed in claim15, further comprising a third wiring passage and a fourth wiringpassage, wherein the third wiring passage extends from the second wiringpassage to a corresponding centrifugal fan in the first air passage, andthe fourth wiring passage extends from the second wiring passage to acorresponding centrifugal fan in the second air passage.